First, make sure the bartender you hire is licensed, experienced, and insured. This way, he’ll be able to recognize who should stop drinking and have the tact to insist that they do. Claudia Hanlin, a Martha Stewart Weddings contributing editor and co-owner of the Wedding Library in New York City, also suggests making enticing nonalcoholic options, like a great-tasting punch, readily accessible throughout the event. Toward the end of the night, nix the booze, and offer only alcohol-free beverages, like water, tea, and coffee. Even with all these efforts, you might still wind up with people who’ve downed a few too many. Have a designated-driver service or a taxi company on call, and give your planner and caterer their numbers. Or enlist some of your more sober-minded guests to serve as in-a-pinch chauffeurs. Also, consider reserving a crash pad at a nearby hotel for those who live too far away to be driven.